Fundamentals of HVACR

 Undoubtedly you have seen news articles mentioning HFO refrigerants with names like 1234yf, 1234ze(Z), or 1234ze(E). Although these names l...

Like many others, I have assumed for years that the original and proper spelling for the ubiquitous gray cloth tape is duct tape, as in tapi...

Chalk and Talk  Several years ago a fellow HVAC instructor told me he had been strongly encouraged by his immediate supervisor to do more le...

 Diesel Effect Compressor Explosions There have been a few rare but potentially fatal accidents involving exploding compressors due to an ef...

  Instructors worry about not knowing all the answers. I know that I do. Let me put you at ease. You don’t have to know all the answers to b...

  When lecturing, you should be more interested in ensuring the students understand what you are saying than covering a specific amount of m...

A common problem that many students have across all levels of education is a failure to gain a thorough understanding of the subject matter ...